Microwave-Assisted Stereoselective 1,3-Dipolar Cycloaddition of C,N-Diarylnitrone (i.e., N-(Arylmethylidene)benzenamine N-Oxide) and Bis(arylmethylidene)acetone (=1,5-Diarylpenta-1,4-dien-3-one): NMR and Crystal Analysis of Diastereoisomeric Bis(isoxazoli
Microwave‐assisted stereoselective 1,3‐dipolar cycloaddition of C,N‐diarylnitrones (i.e., N‐(arylmethylidene)benzenamine N‐oxides) 2 to substituted bis(arylmethylidene)acetones (=1,5‐diarylpenta‐1,4‐dien‐3‐ones) 1 leading to diastereoisomer pairs of bis‐isoxazolidines 3 and 4 in good to excellent yield is described (Scheme 2 and Table 2). The configuration outcome of the reaction is discussed based on the NMR and